\(\dfrac{1995}{1997}\times\dfrac{1009}{1993}\times\dfrac{997}{1995}\times\dfrac{1997}{995}\)

\(=\dfrac{1995}{1995}\times\dfrac{1997}{1997}\times\dfrac{997}{995}\times\dfrac{1009}{1993}=\dfrac{1009\times997}{995\times1993}\)

\(=\dfrac{1005973}{1983035}\)

TK:

Khi ta bớt chữ số tận cùng là 4 thì ta được số mới . Vậy số cần tìm gấp 10 lần và 4 đơn vị số cần tìm .

Ta có sơ đồ :

Số cần tìm   |-----|-----|-----|-----|-----|-----|-----|-----|-----|-----|-4-|

Số mới        |-----|

Hiệu số phần bằng nhau là :

 10 - 1 = 9 ( phần )

9 lần số mới là :

 787 - 4 = 783

Vậy số mới là :

 783 : 9 = 87

Số cần tìm là :

 87 x 10 + 4 = 874

                      Đ/S :874

        Vì bỏ chữ số 4 tận cùng bên phải đi ta được số mới nên số cũ gấp số mới 10 lần và 4 đơn vị ta có sơ đồ:

Theo sơ đồ ta có:

Số mới là: (607 - 4) : (10 - 1) = 67

Số cần tìm là: 67 x 10 + 4  = 674

Đáp số: 674 

  \(x+x+x+2+9+16+23\)

= \(x\) x 1 +  \(x\) x 1 +  \(x\) x 1 + (2 + 9 + 16 + 23)

= \(x\) x (1 + 1 + 1 + 1) + (11 + 16 + 23)

= \(x\) x 4 + (27 + 23)

= \(x\) x 4 + 50

   46 x 75 + 46 x 22 + 46 x 3 

= 46 x (75 + 22 + 3)

= 46 x (97 + 3)

= 46 x 100

= 4600

  46 x 75 + 46 x 22 + 46 x 3 

= 46 x ( 75 + 22 + 3 )

= 46 x 100

= 4600

 46 x 75 + 46 x 22 + 46 x 3 

= 46 x ( 75 + 22 + 3 )

= 46 x 100

= 4600

dc ko

1.I go to school is turn right

2.my father is tall and strong

3.my mother is a teacher

4.I wash the dishes help at home

5.I was at the park last weekend

1.I go to school is turn right

2.my father is tall and strong

3.my mother is a teacher

4.I wash the dishes help at home

5.I was at the park last weekend

The most I love in my family is my great mommy. She is thirty years old. She looks very beautiful , gentle and like an angle. She is an English teacher. She works in Marie Cuire school. She often goes to work at 6 a.m to 7 p.m. She is very kind and sometimes at dinner she buys me chicken or someting I like to help me feel happy. I love my mom very much! Thanks mom for all the loves mom always give to me!!!❤

This is my sister. Her name is Uyen. She is 24 years old. She’s short and slim. She has long, black hair. She is a teacher. She teaches Maths at a primary school. She usually goes to work by motorbike. She loves her work. I love her very much

1 My grandmother goes to the hospital by taxi.

2 Does Lucy hav long, blond hair?

3 My sister puts away the groceries at home

4 Were Bill and Ben at the field last weekend?

5 Sarah works at a restaurant, she is a cashier 

1 He is strong and big

2 He is a farmer

3 He gets to the farm on foot

5 He was at the museum yesterday